Item not found to search in supplies and demands

Summary:

In Supply Plan-- In Supplies and Demands screen-- W

e are trying to search the planned orders for some items. But getting an error in item search box: Example- for item 56986. Error comes as: Invalid value: 56986.

We have ran collections and Planning Method is set as MPS Planning for these items. Any idea, why these items will not come in Supplies and Demands screen?

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